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    https://www.yuque.com/u21248648/ed5e0r/gqd5eb JS前三周

    JS 前三周
    https://www.yuque.com/youran-uiux9/ao4o62/cy7ico

    JS（javascript）的构成
    ECMAScript  核心
    DOM  文档对象模型
    BOM  浏览器对象模型

    <div>1111</div>
    <h1 onclick="console.log('bbbb')">1111</h1>

    <script>
        // 控制台输出
        
       /* console.log("qqq");
        console.log(document.querySelector("div"));*/
    </script>
    <script src="1.js"></script>
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